Adjustable harrow



(No Model.)

W. T. PARKER.

ADJUSTABLE HARROW. No. 358,622. Patented'Mar. 1, 1887.

ATTORNEYS.

Nv PETERS, Phclo-Lilhcgrnphar. Washin ton. D. C.

WILLIAM T. PARKER, OF EUREKA, INDIANA.

ADJUSTABLE HARROW.

SPECIFICATION forming part of Letters Patent No. 358,622, dated March 1, 1887.

Application filed November 1, 1886. Serial No. 217.727. (No model.)

To all whom it may concern.-

Be it known that 1, WILLIAM T. PARKER, of Eureka, in the county of Spencer and State of Indiana, have invented a new and Improved Adjustable Harrow, of which the following is a full, clear, and exact description.

This invention relates to harrows, the object of the invention being to provide alightdraft, adjustable, cheap, and durable harrow, and one that may be used with equal facility to break ground or to smooth a plowed field.

The invention consists of a novel form of barrow-tooth, which teeth are arranged in a novel manner, as will be hereinafter explained, and specifically pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification,

in which similar figures of reference indicate corresponding parts in all the views.

Figure 1 is a plan View of my improved form of harrow. Fig. 2 is a sectional elevation of the same, the view being taken on line :0 0c of Fig. 1. Fig. 3 is a View of a portion of the central teeth of the harrow. Fig. 4 is a sectional view taken on line 3/ y of Fig. 3, and Fig. 5 is an enlarged sectional View of the axle.

In the drawings, 10 represents the axle of the harrow, which is' carried by two wheels, 11, preferably of the form illustrated. The axle 10 is formed with recesses 5, to receive the harrow-teeth, and with round portions to receive the rear end of the pole or tongue 12, and the rear ends of the braces 13, that are connected to the pole, the main body of the axle being rectangular in cross-section.

A seat frame or standard, 14, is bolted or otherwise rigidly connected to the upper face of the pole 12, the rear arm of the seat-standard carrying the seat 15. To one side of the standard 14 there is secured a segmental toothed rack, 16, said rack consisting of a toothed plate, 3, and a guiding-plate, 2, said plates being held to the frame 14 by bolts 17, which bolts pass through spacing-sleeves 18 and 19, the sleeves 18 being arranged between the plates 2 and 3, while the sleeves 19 are arranged between the frame 14 and the plate 2. An operating-lever, 20, the lower end of which is rigidly connected to the axle 10 by means of a socket, 6, extends upward and through the space between the plates 2 and 3, the upper end of the lever 20 being provided with a thumb-lever, 21, which carries a broad catch-tooth, 22, that is normally held in engagement with the teeth of the rack 16 by a spring, 23.

The harrow teeth 30, which are seated within the recesses 5 of the axle l0, consist of bars, the upper ends of which are bent to rectangular form, this bend 31 being so proportioned that the axle will fit closely therein, and, if desired, each tooth may be held to the axle by a set-screw, as 4, which is best shown in Fig. 2. From the axle the teeth extend backward and downward, and finally down ward and forward, the lower ends of the teeth being flattened and flared off to the right or to the left, the teeth upon the right of the pole flaring to the right, while the teeth upon the left of the pole flare to the left.

With a harrow constructed as described, the teeth may be thrown downward by throwing the lever 20 backward in the direction of the arrow shown in connection therewith, and the teeth being so thrown downward will be held against lilting, owing to the engagement of the catch-tooth 22 with the teeth of the rack 16.

The harrow described may be used either upon plowed or upon unbroken ground, and may be adjusted, as before stated, so as to make almost any required depth of cut.

Having thus fully described my invention, I claim as new and desire to soon re by Letters Patent 1. In a sulky harrow, the combination, with the axle 10, provided with the recesses 5, of the teeth 30, secured in the said recesses, a seat-frame, 14, a rack in the seat-frame, and a lever rigidly secured to the "axle and provided with a catch engaging the rack, substantially as herein shown and described.

2. In a harrow, the combination, with the main axle of the machine, of harrow-teeth rigidly connected to said axle and arranged in inverse order upon either side of the pole, a lever, 20, also rigidly connected to the axle, and a double rack, 16, with which a pawl carried by the lever is arranged to engage, substantially as described.

3. A wheeled harrow provided with teeth secured to the axle and formed with flattened and flaring points, the points of the teeth upon the left of the pole flaring to the left, while the points of the teeth upon the right flare to the right, substantially as described.

Witnesses: WILLIAM T. PARKER.

EDM. A. Rnonns, Lnwrn S. Cnooxs. 

